<template>
    <view class="uni-cursor-point">
        <view
            v-if="popMenu && (leftBottom || rightBottom || leftTop || rightTop) && content.length > 0"
            :class="{
                'uni-fab--leftBottom': leftBottom,
                'uni-fab--rightBottom': rightBottom,
                'uni-fab--leftTop': leftTop,
                'uni-fab--rightTop': rightTop
            }"
            class="uni-fab"
            :style="nvueBottom"
        >
            <view
                :class="{
                    'uni-fab__content--left': horizontal === 'left',
                    'uni-fab__content--right': horizontal === 'right',
                    'uni-fab__content--flexDirection': direction === 'vertical',
                    'uni-fab__content--flexDirectionStart': flexDirectionStart,
                    'uni-fab__content--flexDirectionEnd': flexDirectionEnd,
                    'uni-fab__content--other-platform': !isAndroidNvue
                }"
                :style="{ width: boxWidth, height: boxHeight, backgroundColor: styles.backgroundColor }"
                class="uni-fab__content"
                elevation="5"
            >
                <view v-if="flexDirectionStart || horizontalLeft" class="uni-fab__item uni-fab__item--first" />
                <view
                    v-for="(item, index) in content"
                    :key="index"
                    :class="{ 'uni-fab__item--active': isShow }"
                    class="uni-fab__item"
                    @click="_onItemClick(index, item)"
                >
                    <image
                        :src="item.active ? item.selectedIconPath : item.iconPath"
                        class="uni-fab__item-image"
                        mode="aspectFit"
                    />
                    <text
                        class="uni-fab__item-text"
                        :style="{ color: item.active ? styles.selectedColor : styles.color }"
                        >{{ item.text }}</text
                    >
                </view>
                <view v-if="flexDirectionEnd || horizontalRight" class="uni-fab__item uni-fab__item--first" />
            </view>
        </view>
        <view
            :class="{
                'uni-fab__circle--leftBottom': leftBottom,
                'uni-fab__circle--rightBottom': rightBottom,
                'uni-fab__circle--leftTop': leftTop,
                'uni-fab__circle--rightTop': rightTop,
                'uni-fab__content--other-platform': !isAndroidNvue
            }"
            class="uni-fab__circle uni-fab__plus"
            :style="{ 'background-color': styles.buttonColor, bottom: nvueBottom }"
            @click="_onClick"
        >
            <uni-icons
                class="fab-circle-icon"
                :type="styles.icon"
                :color="styles.iconColor"
                size="32"
                :class="{ 'uni-fab__plus--active': isShow && content.length > 0 }"
            ></uni-icons>
            <!-- <view class="fab-circle-v"  :class="{'uni-fab__plus--active': isShow && content.length > 0}"></view>
			<view class="fab-circle-h" :class="{'uni-fab__plus--active': isShow  && content.length > 0}"></view> -->
        </view>
    </view>
</template>

<script>
let platform = "other";
// #ifdef APP-NVUE
platform = uni.getSystemInfoSync().platform;
// #endif

/**
 * Fab 悬浮按钮
 * @description 点击可展开一个图形按钮菜单
 * @tutorial https://ext.dcloud.net.cn/plugin?id=144
 * @property {Object} pattern 可选样式配置项
 * @property {Object} horizontal = [left | right] 水平对齐方式
 * 	@value left 左对齐
 * 	@value right 右对齐
 * @property {Object} vertical = [bottom | top] 垂直对齐方式
 * 	@value bottom 下对齐
 * 	@value top 上对齐
 * @property {Object} direction = [horizontal | vertical] 展开菜单显示方式
 * 	@value horizontal 水平显示
 * 	@value vertical 垂直显示
 * @property {Array} content 展开菜单内容配置项
 * @property {Boolean} popMenu 是否使用弹出菜单
 * @event {Function} trigger 展开菜单点击事件，返回点击信息
 * @event {Function} fabClick 悬浮按钮点击事件
 */
export default {
    name: "UniFab",
    props: {
        pattern: {
            type: Object,
            default() {
                return {};
            }
        },
        horizontal: {
            type: String,
            default: "left"
        },
        vertical: {
            type: String,
            default: "bottom"
        },
        direction: {
            type: String,
            default: "horizontal"
        },
        content: {
            type: Array,
            default() {
                return [];
            }
        },
        show: {
            type: Boolean,
            default: false
        },
        popMenu: {
            type: Boolean,
            default: true
        }
    },
    emits: ["fabClick", "trigger"],
    data() {
        return {
            fabShow: false,
            isShow: false,
            isAndroidNvue: platform === "android",
            styles: {
                color: "#3c3e49",
                selectedColor: "#007AFF",
                backgroundColor: "#fff",
                buttonColor: "#007AFF",
                iconColor: "#fff",
                icon: "plusempty"
            }
        };
    },
    computed: {
        contentWidth(e) {
            return (this.content.length + 1) * 55 + 15 + "px";
        },
        contentWidthMin() {
            return "55px";
        },
        // 动态计算宽度
        boxWidth() {
            return this.getPosition(3, "horizontal");
        },
        // 动态计算高度
        boxHeight() {
            return this.getPosition(3, "vertical");
        },
        // 计算左下位置
        leftBottom() {
            return this.getPosition(0, "left", "bottom");
        },
        // 计算右下位置
        rightBottom() {
            return this.getPosition(0, "right", "bottom");
        },
        // 计算左上位置
        leftTop() {
            return this.getPosition(0, "left", "top");
        },
        rightTop() {
            return this.getPosition(0, "right", "top");
        },
        flexDirectionStart() {
            return this.getPosition(1, "vertical", "top");
        },
        flexDirectionEnd() {
            return this.getPosition(1, "vertical", "bottom");
        },
        horizontalLeft() {
            return this.getPosition(2, "horizontal", "left");
        },
        horizontalRight() {
            return this.getPosition(2, "horizontal", "right");
        },
        // 计算 nvue bottom
        nvueBottom() {
            // #ifdef APP-NVUE
            const safeBottom = uni.getSystemInfoSync().windowBottom;
            return 30 + safeBottom;
            // #endif
            // #ifndef APP-NVUE
            return 30;
            // #endif
        }
    },
    watch: {
        pattern: {
            handler(val, oldVal) {
                this.styles = Object.assign({}, this.styles, val);
            },
            deep: true
        }
    },
    created() {
        this.isShow = this.show;
        if (this.top === 0) {
            this.fabShow = true;
        }
        // 初始化样式
        this.styles = Object.assign({}, this.styles, this.pattern);
    },
    methods: {
        _onClick() {
            this.$emit("fabClick");
            if (!this.popMenu) {
                return;
            }
            this.isShow = !this.isShow;
        },
        open() {
            this.isShow = true;
        },
        close() {
            this.isShow = false;
        },
        /**
         * 按钮点击事件
         */
        _onItemClick(index, item) {
            if (!this.isShow) {
                return;
            }
            this.$emit("trigger", {
                index,
                item
            });
        },
        /**
         * 获取 位置信息
         */
        getPosition(types, paramA, paramB) {
            if (types === 0) {
                return this.horizontal === paramA && this.vertical === paramB;
            } else if (types === 1) {
                return this.direction === paramA && this.vertical === paramB;
            } else if (types === 2) {
                return this.direction === paramA && this.horizontal === paramB;
            } else {
                return this.isShow && this.direction === paramA ? this.contentWidth : this.contentWidthMin;
            }
        }
    }
};
</script>

<style lang="scss">
$uni-shadow-base: 0 1px 5px 2px
    rgba(
        $color: #000000,
        $alpha: 0.3
    ) !default;

.uni-fab {
    position: fixed;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    justify-content: center;
    align-items: center;
    z-index: 10;
    border-radius: 45px;
    box-shadow: $uni-shadow-base;
}

.uni-cursor-point {
    /* #ifdef H5 */
    cursor: pointer;
    /* #endif */
}

.uni-fab--active {
    opacity: 1;
}

.uni-fab--leftBottom {
    left: 15px;
    bottom: 30px;
    /* #ifdef H5 */
    left: calc(15px + var(--window-left));
    bottom: calc(30px + var(--window-bottom));
    /* #endif */
    // padding: 10px;
}

.uni-fab--leftTop {
    left: 15px;
    top: 30px;
    /* #ifdef H5 */
    left: calc(15px + var(--window-left));
    top: calc(30px + var(--window-top));
    /* #endif */
    // padding: 10px;
}

.uni-fab--rightBottom {
    right: 15px;
    bottom: 30px;
    /* #ifdef H5 */
    right: calc(15px + var(--window-right));
    bottom: calc(30px + var(--window-bottom));
    /* #endif */
    // padding: 10px;
}

.uni-fab--rightTop {
    right: 15px;
    top: 30px;
    /* #ifdef H5 */
    right: calc(15px + var(--window-right));
    top: calc(30px + var(--window-top));
    /* #endif */
    // padding: 10px;
}

.uni-fab__circle {
    position: fixed;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    justify-content: center;
    align-items: center;
    width: 55px;
    height: 55px;
    background-color: #3c3e49;
    border-radius: 45px;
    z-index: 11;
    // box-shadow: $uni-shadow-base;
}

.uni-fab__circle--leftBottom {
    left: 15px;
    bottom: 30px;
    /* #ifdef H5 */
    left: calc(15px + var(--window-left));
    bottom: calc(30px + var(--window-bottom));
    /* #endif */
}

.uni-fab__circle--leftTop {
    left: 15px;
    top: 30px;
    /* #ifdef H5 */
    left: calc(15px + var(--window-left));
    top: calc(30px + var(--window-top));
    /* #endif */
}

.uni-fab__circle--rightBottom {
    right: 15px;
    bottom: 30px;
    /* #ifdef H5 */
    right: calc(15px + var(--window-right));
    bottom: calc(30px + var(--window-bottom));
    /* #endif */
}

.uni-fab__circle--rightTop {
    right: 15px;
    top: 30px;
    /* #ifdef H5 */
    right: calc(15px + var(--window-right));
    top: calc(30px + var(--window-top));
    /* #endif */
}

.uni-fab__circle--left {
    left: 0;
}

.uni-fab__circle--right {
    right: 0;
}

.uni-fab__circle--top {
    top: 0;
}

.uni-fab__circle--bottom {
    bottom: 0;
}

.uni-fab__plus {
    font-weight: bold;
}

// .fab-circle-v {
// 	position: absolute;
// 	width: 2px;
// 	height: 24px;
// 	left: 0;
// 	top: 0;
// 	right: 0;
// 	bottom: 0;
// 	/* #ifndef APP-NVUE */
// 	margin: auto;
// 	/* #endif */
// 	background-color: white;
// 	transform: rotate(0deg);
// 	transition: transform 0.3s;
// }

// .fab-circle-h {
// 	position: absolute;
// 	width: 24px;
// 	height: 2px;
// 	left: 0;
// 	top: 0;
// 	right: 0;
// 	bottom: 0;
// 	/* #ifndef APP-NVUE */
// 	margin: auto;
// 	/* #endif */
// 	background-color: white;
// 	transform: rotate(0deg);
// 	transition: transform 0.3s;
// }

.fab-circle-icon {
    transform: rotate(0deg);
    transition: transform 0.3s;
    font-weight: 200;
}

.uni-fab__plus--active {
    transform: rotate(135deg);
}

.uni-fab__content {
    /* #ifndef APP-NVUE */
    box-sizing: border-box;
    display: flex;
    /* #endif */
    flex-direction: row;
    border-radius: 55px;
    overflow: hidden;
    transition-property: width, height;
    transition-duration: 0.2s;
    width: 55px;
    border-color: #dddddd;
    border-width: 1rpx;
    border-style: solid;
}

.uni-fab__content--other-platform {
    border-width: 0px;
    box-shadow: $uni-shadow-base;
}

.uni-fab__content--left {
    justify-content: flex-start;
}

.uni-fab__content--right {
    justify-content: flex-end;
}

.uni-fab__content--flexDirection {
    flex-direction: column;
    justify-content: flex-end;
}

.uni-fab__content--flexDirectionStart {
    flex-direction: column;
    justify-content: flex-start;
}

.uni-fab__content--flexDirectionEnd {
    flex-direction: column;
    justify-content: flex-end;
}

.uni-fab__item {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 55px;
    height: 55px;
    opacity: 0;
    transition: opacity 0.2s;
}

.uni-fab__item--active {
    opacity: 1;
}

.uni-fab__item-image {
    width: 20px;
    height: 20px;
    margin-bottom: 4px;
}

.uni-fab__item-text {
    color: #ffffff;
    font-size: 12px;
    line-height: 12px;
    margin-top: 2px;
}

.uni-fab__item--first {
    width: 55px;
}
</style>
